D.A.V. PUBLIC SCHOOL, NEW PANVEL

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1 D.A.V. PUBLIC SCHOOL, NEW PANVEL Plot No. 267, 268, Sector-10, New Panvel, Navi Mumbai (Maharashtra). Phone , , Telefax / Practice Paper STD XI SUBJECT :INFORMATICS PRACTICES. Note: 1. Answer the questions after carefully reading the text. Q1. Answer the following questions TIME: 3HRS MARKS:70 (a) What is System software? Write one point difference between Compiler and Interpreter. 2 (b) What are the major strengths and weaknesses of computer? 2 (c) Write short note:- i. Digital Certificate ii. Firewall & Cookies 2 (d) Write two point differences between volatile memory and non-volatile memory? 2 (e) Expend the following :- i. OCR ii. IDE iii. MICR iv. USB 2 Q2. Answer the following questions (a) Write the valid identifiers. Data#rec, _data$, break_loop, data_1, data of birth, my.file, go_to, m.n._data 2 (b) What is RAD? Write any one name of RAD tool. 2 (c) Write down the common Methods and Properties of jtextfield and jlabel (any two). 2 (d) Distinguish between unary, binary & ternary operator. Give examples of Java operators for each one of them. 2

2 (e) Write one Difference of the following: i. Call by Value and Call by Reference ii. Constructor and Methods 2 Q3 Answer the following questions (a) Design a GUI, with a TextField, Label and a Button. Write the code for the Button to accept a integer into the TextField from the user and then calculate and display the factorial of a given number in the Label provided. Using do-while loop. 2 (b) Design a GUI, with a TextField, TextArea and a Button. Write the code for the Button to accept a integer number into the TextField from the user and then display the multiplication table of the given number in the TextArea provided. Using for loop 2 (c) Rewrite the following fragment using while loop : int sum = 0 ; for ( int i = 0 ; i < = 5 ; + + i ) sum = sum + i ; System. out. println ( Sum is : + sum ) ; 2 (d) Rewrite the following fragment using switch : if ( ch = = E ) eastern + + ; if ( ch = = W ) western + + ; if ( ch = = N ) northern + + ; if ( ch = = S ) else southern + + ; unknown + + ; 2 (e) Design a GUI, with a TextField, Label and a Button. Write the code for the Button to accept a integer number into the TextField from the user and then check

3 wither the given number is palindrome or not and display the same as Palindrome or Not a Palindrome in the Label provided. Using while loop and if-else statement. 2 Q4 Answer the following questions (a) JVM 1 (b) Visual Programming 1 (c) Containers or container controls? 1 (d) Widget 1 (e) Implicit and explicit type conversion 1 Q5. Answer the following questions (a) Write equivalent Java expressions for the following expressions:- i. a + b>= b + ++a ii. e 2x 4 x 2 (b) Identify the data type of the following expression: i. intval * longval ch ii. ft + longval / sh If ch is an char, sh is an short, intval is an int, longval is an long and ft is float type. 2 I Underline the error(s) and rewrite the correct code in the following :- public class MAINPRO { int a,b; public void MAINPRO() { obj.a=100; obj.b=200; } public static void main(string args[]) { MAINPRO obj = new MAINPRO(12,30); a=20; b=30; } } 2 (d) Find the output of the following code:- boolean b; int d, as=290; int x1=100, x2=200, x3=300 ;

4 i. b=x1*2==x3 System.out.println( B= + b); ii. d= as-x1>x2? x1:x2 System.out.println( D= + d); 2 (e) Explain the following point with example:- i. Try & Catch ii. Type of Errors 2 Q6. Rewrite following : (a) Write a methods clacsum(), calcavg()& calcmax() with pass three number as argument and return the Summation, Average and Maximum number respectively. Also write code for ReSet & Exit buttons to Clear all text fields and exit from the application respectively. 5 Q7 Q7 Answer the following questions Write a SQL commands for table FURNITURE Table: FURNITURE ITEMNO ITEMNAME TYPE DATEOFSTOCK PRICE DISCOUNT IN T VARCHAR VARCHAR DATE INT IN T Primary Key Not Null Not Null Default Price < 40,000 - a). Write a MYSQL Command to create a furniture table including all constraints. 2 c). b). Write a MYSQL command to insert below data in FURNITURE table. ITEMNO ITEMNAME TYPE DATEOFSTOCK PRICE DISCOUNT 1 White lotus Double Bed 23/02/ Pink feather Baby cot 20/01/ Dolphin Baby cot 19/02/ Write a MYSQL command to change TYPE Rolling Table of FURNITURE where ITEMNO less then or equal to 2. 2

5 d). Write a MYSQL quarry to Calculate the discount from the specified percentage and PRICE column. 2 e). Write a MYSQL quarry to display ITEMANME (in lower case) and DATEOFSTOCK from FURNITURE table which take discount is null. 2 Q8 Answer the following questions ::Table: Employee EMPNO ENAME GENDER DEPTNO COMM SALARY 101 RAJINDRA M SUMITRA F PANJWANI F ANIL KUMAR M a). Give a statement as follows: CREATE TABLE EMP( EMPNO INT(10) PRIMARY KEY, ENAME VARCHAR(30) NOT NULL, GENDER CHAR(1) DEFAULT M, DEPTNO INT(6) REFERENCES DEPT(DEPTNO), SALARY INT CHECK(SALARY>2000)); Identify the number and types of constraints in the table EMPLOYEE. 2 b). Write the MySQL command to ADD new column JOB VARCHAR(20) NOT NULL. 2 c). Write the MySQL command to remove a GENDER column from Employee table 2 d). Find the output of the following commands:- i. SELECT SUBSTR(ENAME,1,5), COMM FROM EMPLOYEE WHERE COMM IS ii. NOT NULL; SELECT INSTR(ENAME, I ), GENDER FROM EMPLOYEE; iii. SELECT TRUNCATE(SALARY,-2), ROUND(SALARY,-2) FROM EMPLOYEE; SELECT EMPNO, ENAME, SALARY, IFNULL(COMM, Zero ) COMMISSION FROM EMPLOYEE WHERE ENAME LIKE ---J% ; 4

Sample Paper for class XII IP with Answers Prepared by Successbook Group Sub: - Informatics Practices Total Marks :70 Time:3hr

Sample Paper for class XII IP with Answers Prepared by Successbook Group Sub: - Informatics Practices Total Marks :70 Time:3hr 1. (a.) Why do we use repeater? A repeater is used to regenerate data and